/*
  spr-sdk: Statistical Pattern Recognition SDK
  Copyright (C) 2010 Marco Ambu

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _UTIL_FORMATTER_H
#define	_UTIL_FORMATTER_H

#include <string>
#include <ostream>
#include <sstream>

namespace util {

// Singleton
class Formatter {
private:
  Formatter();
  Formatter(const Formatter& orig); // not implemented
  Formatter& operator=(const Formatter& orig); // not implemented

public:
  static Formatter& getInstance() { static Formatter f; return f; }

  // Method to specialize
  // For example: type double
  // 1) Put the following template specialization declaration in one header file
  //    template <> void Formatter::toStream<double>(const double& t, std::ostream& os);
  // 2) Put your specific implementation in a src file
  template <typename T>
  void toStream(const T& t, std::ostream& os)
  {
    os << t << std::endl;
  }

  template <typename T>
  std::string toString(const T& t)
  {
    std::ostringstream os;
    toStream(t, os);
    return os.str();
  }
};

} // namesapce util

#endif	// _UTIL_FORMATTER_H
